Effectiveness of an attic installation is difficult to predict. There are too many unknowns, in the material of the roof and structure, trees and buildings and other obstructions on the other side of the roof, and conductive and/or noisy wires, pipes, chimneys, etc. that are part of the building. Antennas are designed to function in free air, and you can change their electrical characteristics by placing them in other environments. Some building materials are more transparent to signals than others. Stucco, for example, contains wire mesh typically and is basically opaque to TV signals.
If you have an attic site that will probably be ok - shingle roof, wood/vinyl side walls, no wire or foil in the walls - and you can aim the antenna at 350 or 40 magnetic, it might work for you. Again, I would go big and get the DB8e and point one panel at 350 and one at 40. This antenna is compact for what it is, but it's still ca 4' square. You may also pick up WNSC, even though it will be to the back side of one of the panels ... at 74 db NM it's very very strong.
No guarantees though ... esp. if there are obstructions like trees and buildings outside in the direction of aim.
It is also possible to hire an installer for your roof installation.
Good luck!
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